bip70 payreq: catch TimeoutError to avoid hanging "please wait" dialog
bip70 payreq: catch TimeoutError to avoid hanging "please wait" dialog

related #5337

spesmilo/electrum,spesmilo/electrum,spesmilo/electrum,pooler/electrum-ltc,wakiyamap/electrum-mona,pooler/electrum-ltc,pooler/electrum-ltc,vialectrum/vialectrum,pooler/electrum-ltc,wakiyamap/electrum-mona,wakiyamap/electrum-mona,vialectrum/vialectrum,spesmilo/electrum,vialectrum/vialectrum,wakiyamap/electrum-mona